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Uncertainty Help ASAP please! :'(

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Hi guys,

Please help me answer:

1. Is a ruler with measurement (eg. 15.1 cm) has a 0.1cm or 0.05cm uncertainty? I'm confused of which one is true.

2. Is an electronic balance with measurement (eg. 70.52 g) has a 0.01g or 0.005g uncertainty?

HELP ME PLEASE!

Thank you!

:)

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